Explanation of some common terms in power adapters

Want to understand the power adapter, you first need to understand some of the basic parameters and terms about the power adapter, such as output voltage, input current, power, input inrush current, ripple, EMI circuits, etc., only to understand the meaning of these terms, you can read and understand the power adapter through them.

1.PFC: PFC (Power Factor Correction) Power factor refers to the ratio of active power to apparent power. Power factor correction is achieved by installing a power factor corrector (often called PFC) in the power supply to reduce the high harmonic currents. Power factor correction improves the utilization of electrical energy and reduces interference between electrical devices. The higher the power factor, the lower the pollution of the power supply to the grid, can effectively reduce interference and save energy. there are two kinds of PFC, a passive PFC (passive PFC), an active PFC (active PFC). PFC is a major feature of the CCC power supply, all through the CCC certification of power supplies, must be with PFC circuit.

2. Conversion efficiency: power supply in the work of each conversion process is unavoidable, there is some energy loss, such energy loss is manifested in the reduction of power, for the entire conversion process, the ratio of input power and output power is the conversion efficiency. Conversion efficiency of the power supply is a very important parameter, high efficiency power supply more energy saving, in the same power supply can provide more usable power, and its own heat small, more stable. Conversion efficiency also has a direct impact on the power supply's energy efficiency rating.

3. Rated power, peak power: rated power refers to the power supply can continuously output the effective power, that is, in the normal operating environment can continue to work the maximum power; peak power refers to the maximum power of the power supply to withstand the power, that is, the power supply in an instant or a few minutes to withstand the maximum power.

4.OPP: over power protection, when the total output power of the power supply exceeds a certain value (i.e. OPP point), the power supply should limit its output power or shut down its output to avoid excessive load power and damage to the power supply or danger. the OPP point is usually higher than the rated power of the power supply.

If you want to know more about power adapter, you can pay attention to Eahunt, as a power adapter manufacturer, we will continue to share some knowledge about power adapter with you.

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